Waterproofing membranes are protective layers designed to prevent water from penetrating surfaces. They are commonly used in construction to safeguard structures like roofs, basements, and foundations from moisture damage. These membranes can be made from various materials, including bitumen, PVC, and EPDM, each offering different levels of durability and flexibility. These membranes can be applied in different ways, such as through sheets or liquid coatings. Proper installation is crucial to ensure effectiveness, as any gaps or defects can lead to water infiltration. Overall, waterproofing membranes play a vital role in maintaining the integrity of buildings and extending their lifespan.